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            <h1 id="seo-header">『算法-ACM竞赛-POJ』 1170 Shopping Offers非状态压缩做法</h1>
            
            
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                <h1 id="『算法-ACM-竞赛-POJ』-1170-Shopping-Offers-非状态压缩做法"><a href="#『算法-ACM-竞赛-POJ』-1170-Shopping-Offers-非状态压缩做法" class="headerlink" title="『算法-ACM 竞赛-POJ』 1170 Shopping Offers 非状态压缩做法"></a>『算法-ACM 竞赛-POJ』 1170 Shopping Offers 非状态压缩做法</h1><font size=5 color= blue>
Shopping Offers

<p><font size=3 color= blue> Time Limit: 1000MS Memory Limit: 10000K<br>Total Submissions: 5659 Accepted: 2361</p>
<p><font size=4 color= blue> Description</p>
<p>In a shop each kind of product has a price. For example, the price of a flower is 2 ICU (Informatics Currency Units) and the price of a vase is 5 ICU. In order to attract more customers, the shop introduces some special offers.<br>A special offer consists of one or more product items for a reduced price. Examples: three flowers for 5 ICU instead of 6, or two vases together with one flower for 10 ICU instead of 12.<br>Write a program that calculates the price a customer has to pay for certain items, making optimal use of the special offers. That is, the price should be as low as possible. You are not allowed to add items, even if that would lower the price.<br>For the prices and offers given above, the (lowest) price for three flowers and two vases is 14 ICU: two vases and one flower for the reduced price of 10 ICU and two flowers for the regular price of 4 ICU.<br><font size=4 color= blue> Input</p>
<p>Your program is to read from standard input. The first line contains the number b of different kinds of products in the basket (0 &lt;&#x3D; b &lt;&#x3D; 5). Each of the next b lines contains three values c, k, and p. The value c is the (unique) product code (1 &lt;&#x3D; c &lt;&#x3D; 999). The value k indicates how many items of this product are in the basket (1 &lt;&#x3D; k &lt;&#x3D; 5). The value p is the regular price per item (1 &lt;&#x3D; p &lt;&#x3D; 999). Notice that all together at most 5*5&#x3D;25 items can be in the basket. The b+2nd line contains the number s of special offers (0 &lt;&#x3D; s &lt;&#x3D; 99). Each of the next s lines describes one offer by giving its structure and its reduced price. The first number n on such a line is the number of different kinds of products that are part of the offer (1 &lt;&#x3D; n &lt;&#x3D; 5). The next n pairs of numbers (c,k) indicate that k items (1 &lt;&#x3D; k &lt;&#x3D; 5) with product code c (1 &lt;&#x3D; c &lt;&#x3D; 999) are involved in the offer. The last number p on the line stands for the reduced price (1 &lt;&#x3D; p &lt;&#x3D; 9999). The reduced price of an offer is less than the sum of the regular prices.<br><font size=4 color= blue> Output</p>
<p>Your program is to write to standard output. Output one line with the lowest possible price to be paid.<br><font size=4 color= blue> Sample Input</p>
<p>2<br>7 3 2<br>8 2 5<br>2<br>1 7 3 5<br>2 7 1 8 2 10<br><font size=4 color= blue> Sample Output</p>
<p>14<br><font size=4 color= blue> Source</p>
<p>IOI 1995<br>这是个五维背包问题，背包容量为篮子中各类物品的数量，每种打折情况当成一种商品，代价是包含的物品种类及数量，价值是花费。一看这个题就明了了，那么恭喜你，入坑了，如果只是买打折商品，能不能花费最少先放一边，能不能买完就不现实。所以还要把原价当成一种商品，对于商品的种类，他给的数不连续，写起来麻烦，直接 STL 离散化。差不多这个题就做出来了。<br>下面是丑陋的代码</p>
<figure class="highlight prolog"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br></pre></td><td class="code"><pre><code class="hljs prolog">#include&lt;iostream&gt;<br>#include&lt;cstdio&gt;<br>#include&lt;map&gt;<br>#include&lt;cstring&gt;<br>#include&lt;cmath&gt;<br>#include&lt;vector&gt;<br>#include&lt;algorithm&gt;<br>#include&lt;map&gt;<br>using namespace std;<br>#define mst(a,b) memset((a),(b),sizeof(a))<br>#define inf <span class="hljs-number">0x3f3f3f3f</span><br>#define maxn <span class="hljs-number">100</span><br>#define <span class="hljs-symbol">Abs</span>(a) ((a)&gt;<span class="hljs-number">0</span>?(a):-(a))<br>int val[<span class="hljs-number">6</span>];<br>int qulility[<span class="hljs-number">6</span>];<br>struct obje&#123;<br>    int w[<span class="hljs-number">5</span>];<br>    int value;<br>&#125;obj[<span class="hljs-number">100</span>];<br>int dp[<span class="hljs-number">6</span>][<span class="hljs-number">6</span>][<span class="hljs-number">6</span>][<span class="hljs-number">6</span>][<span class="hljs-number">6</span>];<br>int main()<br>&#123;<br>    int n,t,x;<br>    int c,qu,value;<br>    while(cin&gt;&gt;n)&#123;<br>            mst(dp,inf);<br>            mst(obj,<span class="hljs-number">0</span>);<br>            mst(qulility,<span class="hljs-number">0</span>);<br>            mst(val,<span class="hljs-number">0</span>);<br>            map&lt;int,int&gt; ob;<br>            int i,j;<br>        for(i=<span class="hljs-number">0</span>;i&lt;n;i++)&#123;<br>            cin&gt;&gt;c&gt;&gt;qu&gt;&gt;value;<br>            ob[c]=i;<br>            val[i]=value;<br>            qulility[i]=qu;<br>            obj[i].w[i]=<span class="hljs-number">1</span>;<br>            obj[i].value=value;<br>        &#125;<br>        cin&gt;&gt;t;<br>        for(j=i;j&lt;t+i;j++)&#123;<br>           cin&gt;&gt;x; int a,b;<br>           for(int k=<span class="hljs-number">0</span>;k&lt;x;k++)&#123;<br>            cin&gt;&gt;a&gt;&gt;b;<br>           obj[j].w[ ob[a]]=b;<br>           &#125;<br>           cin&gt;&gt;x;<br>           obj[j].value=x;<br>        &#125;<br>        dp[<span class="hljs-number">0</span>][<span class="hljs-number">0</span>][<span class="hljs-number">0</span>][<span class="hljs-number">0</span>][<span class="hljs-number">0</span>]=<span class="hljs-number">0</span>;<br>        for(int i=<span class="hljs-number">0</span>;i&lt;j;i++)<br>            for(int k=<span class="hljs-number">0</span>;k&lt;=qulility[<span class="hljs-number">0</span>];k++)<br>                for(int l=<span class="hljs-number">0</span>;l&lt;=qulility[<span class="hljs-number">1</span>];l++)<br>                    for(int m=<span class="hljs-number">0</span>;m&lt;=qulility[<span class="hljs-number">2</span>];m++)<br>                          for(int n=<span class="hljs-number">0</span>;n&lt;=qulility[<span class="hljs-number">3</span>];n++)<br>                            for(int o=<span class="hljs-number">0</span>;o&lt;=qulility[<span class="hljs-number">4</span>];o++)&#123;<br>                                if(k&gt;=obj[i].w[<span class="hljs-number">0</span>]&amp;&amp;l&gt;=obj[i].w[<span class="hljs-number">1</span>]&amp;&amp;m&gt;=obj[i].w[<span class="hljs-number">2</span>]&amp;&amp;n&gt;=obj[i].w[<span class="hljs-number">3</span>]&amp;&amp;o&gt;=obj[i].w[<span class="hljs-number">4</span>])<br>                                    dp[k][l][m][n][o]=min(dp[k][l][m][n][o],dp[k-obj[i].w[<span class="hljs-number">0</span>]][l-obj[i].w[<span class="hljs-number">1</span>]][m-obj[i].w[<span class="hljs-number">2</span>]][n-obj[i].w[<span class="hljs-number">3</span>]][o-obj[i].w[<span class="hljs-number">4</span>]]+obj[i].value);<br>                                &#125;<br>        cout&lt;&lt;dp[qulility[<span class="hljs-number">0</span>]][qulility[<span class="hljs-number">1</span>]][qulility[<span class="hljs-number">2</span>]][qulility[<span class="hljs-number">3</span>]][qulility[<span class="hljs-number">4</span>]];<br>    &#125;<br>    return <span class="hljs-number">0</span>;<br>&#125;<br><br></code></pre></td></tr></table></figure>

                
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